Numerical and Experimental Study on the Dynamic Characteristics of Rotor in Distributed Synchronous Compensator
With the widespread application of renewable energy generation in modern power grid,the voltage and inertial support capability of the grid are gradually weakening.Distributed synchronous compensators have been recognized as essential equipment to ensure the sustainable development of renewable energy.As rotating devices,the dynamic characteristics of rotors are deemed crucial for the safe operation of the unit.In this study,the dynamic characteristics of the rotors of distributed synchronous compensators was conducted.The rotor dynamics finite element calculation method was employed,the critical speeds,unbalanced mass harmonic responses,and unbalanced mass dynamic responses during acceleration of both two-pole and four-pole distributed synchronous compensator rotors were analyzed.By comparing the generator rotors of similar capacity,the advantages in dynamic characteristics of distributed synchronous compensators were unveiled.The results of the research indicate that the new type of distributed synchronous compensator rotor possesses a higher critical speed.The unbalanced mass dynamic response is lower than steam turbine generator rotors.Especially for the four-pole synchronous compensator,it has not reached the first-order critical speed at 120％overspeed,and the actual unbalanced mass response is very small,which can effectively prevent unplanned shutdowns due to rotor vibrations.The accuracy of the numerical analysis is confirmed by rotor acceleration test results,providing a reference basis for the selection and design development of distributed synchronous compensators.
NETL
NSTL
万方数据
